static void Main(string[] args)
{
CalArea rect = new CalArea(Rectangle);
CalArea cir = new CalArea(Circle);
float h, w, r;
Console.WriteLine("Enter height of a rectangle : ");
h = Convert.ToSingle(Console.ReadLine());
Console.WriteLine("Enter width of a rectangle : ");
w = Convert.ToSingle(Console.ReadLine());
rect(h, w);
Console.WriteLine("Enter radius of a circle : ");
r = Convert.ToSingle(Console.ReadLine());
cir(r, 0);
}
static void Main(string[] args)
{
TestDelegate obj = new TestDelegate();
CalArea del_obj1 = new CalArea(obj.Rectangle);
CalArea del_obj2 = new CalArea(obj.Triangle);
Console.WriteLine("Enter the Length for Rectangle");
float length = float.Parse(Console.ReadLine());
Console.WriteLine("Enter the breadth for Rectangle");
float width = float.Parse(Console.ReadLine());
del_obj1(length, width);
Console.WriteLine("Enter the Breadth for Triangle ");
float breadth = float.Parse(Console.ReadLine());
Console.WriteLine("Enter the Hieght for Triangle ");
float hieght = float.Parse(Console.ReadLine());
del_obj2(breadth, hieght);
Console.ReadLine();
}
static CalArea calArea = CalculateArea;//1
static void Main(string[] args)
{
double area1 = calArea.Invoke(20);//1
// Anonymous Method
CalArea ca = new CalArea(delegate(int r) //2
{
return(3.1416 * r * r);
});
double area2 = ca(20); //2
//Lamda Expression
CalArea cap = r => 3.1416 * r * r; //3
double area3 = cap(20); //3
// Lamda Expression with Generic delegate
// No need to declare delgate like above
//Func<input,output>
Func <double, double> ca3 = r => 3.1416 * r * r; //4
double area4 = ca3(20); //4
//Action<output>
Action <string> hello = y => Console.WriteLine(y); //5
hello("Hello World!"); //5
//Extension of Func, Returns true or false
Predicate <string> checkIfGrreaterThan5 = x => x.Length > 5; //6
bool checkValue = checkIfGrreaterThan5("Tanvir Iqbal"); //6
//Application of Predicate
List <string> oStrings = new List <string>(); //6
oStrings.Add("Tanvir Iqbal"); //6
oStrings.Add("Iqbal"); //6
string str = oStrings.Find(checkIfGrreaterThan5); //6
}
